Obertan was given a variety of light duties which included watering hanging baskets, pruning the rose bushes - and even washing staff cars at the Carrington training ground.
Obertan, 20, made his first-team bow last month and his green-fingered chores came to an end but not before he impressed staff.
A United source revealed to The Sun: "It's not very often these days a United first-teamer can ever be seen on manual duties!
"But Gabby is a nice kid and he was only too happy to help out with the older coaches' requests.
"He could give the groundsmen a run for their money with his trimming and lawn skills!"